function onResizeHandler() {

      // ALL FUNCTION CALLS TO PERFORM ON RESIZE...

       sizeViewport('content','260');
      sizeViewport('middenblok','230');
      sizeViewport('schaduw_rechts','230');

      }

      function onLoadHandler() {

      // ALL FUNCTION CALLS TO PERFORM ON LOAD...

      sizeViewport('content','260');
      sizeViewport('middenblok','230');
      sizeViewport('schaduw_rechts','230');

      }

      window.onresize = onResizeHandler;

      window.onload = onLoadHandler;